Practice Dma Connected Through Devices (29.1.5.2) - Overview of DMA and Interrupt Driven I/O

Practice: DMA Connected Through Devices

Lesson 29.1.5.2Overview of DMA and Interrupt Driven I/O

Practise this section

9 questions

Flashcard drill
4 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
Sign up to start the exercise
Quiz
3 questions · about 2 min · pass mark 70%. Hints available.
Sign up to start the quiz

6 sample questions

Question 1.
What does DMA stand for?
Show hintHide hint
Think about how data is accessed directly from memory.
Question 2.
Name one mode of DMA transfer.
Show hintHide hint
Recall the two types of data transfer modes mentioned.
3Question 3.
What is the primary function of DMA?
- Manage CPU processes
- Control data transfers between devices and memory
- Perform context switching
Show hintHide hint
Consider what DMA stands for and what it enables.
4Question 4.
Cycle stealing mode allows the CPU to access the bus during transfers.
- True
- False
Show hintHide hint
Think about how cycle stealing differs from burst mode.
Question 5.
You have a system designed for DMA operations transferring 4 MB of data at a time. With a memory bus width of 16 bits, calculate how many data transfer operations are necessary.
Show hintHide hint
Break the 4 MB data down into bytes and factor in the 16-bit width.
Question 6.
Discuss the advantages and disadvantages of burst mode in a multitasking computer environment.
Show hintHide hint
Think about what happens when the bus is occupied with a burst transfer.

5 more questions in this section. Enroll free to practise them all.